Spotlight lamp



E. A. KUEN. SPOTLIGHT LAMP. APPLICATION FILED JUNE 1, I920.

Patented Dec. 12,1922

Patented Dec. l2, 1922..

UNITED STATliZfi teases rarest EUGENE A. KUEN, OF CINCINNATI, OHIO,ASSIGNOR TO THE TI-IOS- J. CORCORAN LAIVJEP COIVIPANY, OF CINCINNATI,OHIO, A CORPORATION OF OHIO.

SPOTLIGHT LAIVIP.

Application filed June 1, 1920. Serial No. 385,613.

T 0 all whom it may concern Be it known that I, EUGENE A. KUEN, a

citizen of the United States, residing in Cincinnati, in the county ofHamilton and State of Ohio, have invented certain new and usefulImprovements in Spotlight Lamps, of which the following is aspecification.

My invention relates to spot light lamps such as are used in connectionwith automobiles and other traveling vehicles, and has for its objectthe providingof new and improved means whereby to provide the spot lightlamp with a mirror, and to provide new, improved, convenient andeconomical means whereby to mount the mirror and se cure the same inplace.

The invention will be further readily understood from the followingdescription and claims, and from the drawing, in which latter:

Fig. 1 is aside elevation of a spot light lamp, partly broken away,embodying my invention.

Fig. 2 is a perspective view of the same.

3 is a perspective view of the split ring,

Fig. 4 is a front view, partly broken away, showing the mirror holdingmeans in position; and,

Fig. 5 is a cross-sectional detail taken on the line 5-5 of Fig. 4.

The body of the spot light lamp is shown at 11, and may be of generalparabolic form. A parabolic reflector 12 is located in the body. Aclosure 13, comprising a ring-member 14 and a usual lens, is suitablysecured to the body, in such usual manner as to cause the lens to pressupon a suitable annular cushion located between the lens and thereflector, not shown. The reflector has an incandescent electric lightbulb 17 there-- in, the plug 18 of the bulb being connected, as bybayonet pin and slot connection 19, with an electric socket 20, receivedin a rearwardly extending cylindrical projection 21 of the reflector.and suitably or adjustably held therein. Electrical conductors 22, 23,connect with the terminals of the socket, to supply the bulb withcurrent. The electric conductors connect in suitable manner with asuitable source of electricity, being shown as extending in the form ofan electric cable 24 through a hole 25 in the wall of the body.

The rear end of the body is provided with an annular groove 31, to forma bead 32,

which is preferably formed in the metal of the body. The body has a rearopening 33, bounded by the rear wall 34 of the groove, the inner edge ofthe rear wall being bent forwardly as a forwardly projecting annularflange 35. The forward wall of the annular groove is formed by alaterally projecting annular wall 38, which slants outwardly andrearwardly to form. a front wedge wall of the groove. The inner edge ofthe front wall of the annular groove is preferably of larger'diameterthan the diameter of the, inner edge of the rear annular wall of saidgroove.

A mirror 41, preferably round and of greater diameter than the diameterof the rear opening, in the body, is received from the inside of thebody upon the rear annular flange. The mirror is shown slightly convex.A cushion 42 is received in front of the back of the mirror to form amirrorbacking, and has its edge presented toward said annular groove.This cushion may be a disk of cardboard or other suitable fibrousmaterial. 1

A split-ring 44 is received over the cushion or backing of the mirror.This split-ring is shown as a flat washer-like ring, the inner edge ofwhich is rearwardly bent, as shown at 45, for forming a rearwardlyprojecting edge arranged to contact the mirror-backing in an annularline distanced from its peripheral edge. The splitring is thuscircumferentially dished. The body of the Washer-like split-ringinclines rearwardly toward its outer edge, to incline its outer edgerearwardly, for being readily inserted under the forward wedge-wall ofthe groove. The washer-like split-ring is at the split 46: thereofprovided with a forwardly extending flange 47. The washerlike split-ringmay be spread by pressure on said flange, for forcing the outerperipheral edge of the split-ring under the wedge-wall of the groove,and spreading the split-ring under said wedge-wall by separating thewalls of the split thereof. Ready release of the split-ring is obtainedby pressure on said flange toward the opposite wall of the split in saidsplit-ring. The spring in the metal of the split-ring tends to force itsouter edge into the inner annular groove for exerting pressure on themirror and pressing the same into place, and maintaining the same firmlyin position. The inner edge I Fig. 3

normally extends rearwardly further than the outer edge.

The walls of the split in the washer are normally in separated relation,as shown in the split-ring being normally of slightly spiral form sothat the wall of the split therein opposite the flange 4? may be readilyinserted in the groove between the mirror-backing and the front wall ofthe groove. 'fhe split-ring is compressed to smaller diameter than its.natural state when inserting the same past the wedge wall and betweenthe wedge wall and the mirror-backing, for the reception of theperipheral edge of the split-ring in said groove. The splitring spreads,due to the spring in. the metal, so as to be received in said groove,and may 7 be additionally forced in place for exerting additionalpressure between said wedge-wall and the mirror-backing, and-therebyforcing the mirror against the rear flange, for holdinc; all the partssecurely in place.

When it is desired to remove the split-ring, pressure is exerted on theflange a? toward the proximate wall of the split in the splitring, tocause sufficient compression oi the split-ring, or reduction of dianeter thereof, to enable it to be readily removed and the mirror andbacking released, for ready renewal of parts.

My improved device provides ready, conv venient and inexpensive meansfor securing the mirror of a spot light lamp in place, and provides aspot llght casing or body of sinple form and construction coactingtherewith By means of my improved device further, uniform pressure isobtained throu hout the circumference of the mirror between the mirrorand the rear wall of tie groove,

1 regardless of any slight warping or inequalities there may be ineither the mirror or said rear wall, without danger of damage'to themirror, and the washer-like split-ring acts to cause close connectionbetween the mirror and the coinpleniental rear edge of the nating in arear annular bead extending radially outward to form an inner annulargroove and having an outer annular groove in front of said bead, theforward wall of said inner annular groove slanting inwardly andforwardly to form a front wedge-wall, the rear wall of said bodyprovided with an opening, the rear wall of the inner annular groove bentto form a forwardly projecting annular flange which is the boundary ofsaid opening, the inner edge of said last-named annular wall being ofless diameter than the diameter of the inner edge of said forward wallof said inner annular groove, a mirror whose outer periphery is locatedin said inner annular groove, and a washer-like splitring received bylateral pressure in saidinner annular groove between said forward wallof said inner annular groove and the peripheral edge portion of saidmirror.

2. Ina spot light lamp, the combination of a body having a reduced rearend terminating in a rear annular bead extending radially outward toform an inner annular groove, the forward wall of said inner annulargrooveslanting inwardly and forwardly to form a front wedge wall, thevall of said body provided with an opening, the rear wall of said innerannular groove bent to form a forwardly projectingannular flange whichis the boundary of said opening, the inner edge of said last-namedannular wall being of less diameter than the diameter of the inner edgeof said forward wall of said inner annular groove, an outwardly convexedmirror whose inner concave back is ented forwardly, and a. washer-likes} alit-ring theainner edge ofwhich'is rearwardly bent and whose outeredgeis inclined rearwardly to form a wedge split-ring, the saidlast-named outer edge and the outer peripheral edge of said mirrorlocated in salt inner annular groove, and said inner rearwardly bentedge of said washer-like splitring located inthe forward concavity ofsaid mirror.

In testimony whereof, l have hereunto signed my name in the presence oftwo sub-' scribing witnesses.

v EUGENE A.

In presence of James J. Frrzrarnron. DELMA WER-NSING.

TUEN.

